Mainstage quit's Unexpectedly

Mainstage just started quiting, it wont even open now. I keep getting unexpectedly quit while using ARP2600 V2 plug-in. The only problems I have removed that plugin and it still wont open have updated, removed MS and reinstall, went back in time machine and used a previous version still no luck. I need to get in this to use and it wont let me. HELP